可能是一些非常基本的東西，但我正在嘗試撰寫一個簡單的 JS 測驗，并且我有一個用于問題、選擇和答案的陣列：
const questions = [
{
question: "What is JavaScript?",
choices: ["An interesting coffee blend", "Something your doctor uses", "A new movie", "A coding language"],
answer: 3
},
{
question: "Which of the following keywords is used to define a variable?",
choices: ["var", "let", "Both A and B", "None of the above"],
answer: 2
},
ETC..
我可以從陣列中選擇一個特定的問題，但不能從中選擇相關的選擇或答案。
function grabQuestion() {
for (let i = 0; i < questions.length; i ) {
const question = questions[i].question
const choices = questions[i].choices
questionEl.textContent = question
console.log(choices)
console.log(answer)
}
}
這只是列出了所有 questions.choices，而不是我在 for 回圈中生成的索引。
我知道這很簡單，但我只是沒有看到它。
uj5u.com熱心網友回復：
根據我的理解，您想獲取特定問題的choicesandanswer以獲得所有答案和選擇？如果是，那么您可以根據問題從陣列中動態獲取它，或者通過為每個問題物件text分配一個。id
讓我用一個例子/演示來解釋：
const questions = [
{
question: "What is JavaScript?",
choices: ["An interesting coffee blend", "Something your doctor uses", "A new movie", "A coding language"],
answer: 3
},
{
question: "Which of the following keywords is used to define a variable?",
choices: ["var", "let", "Both A and B", "None of the above"],
answer: 2
}];
function getQuestionDetails(questionText) {
return questions.find(({ question }) => questionText === question);
}
const selectedQuestionDetails = getQuestionDetails('What is JavaScript?');
console.log('choices', selectedQuestionDetails.choices);
console.log('answer', selectedQuestionDetails.answer);uj5u.com熱心網友回復：
你只是忘了定義answer我認為。只需添加這個。
const answer = questions[i].answer
轉載請註明出處，本文鏈接：https://www.uj5u.com/net/488464.html
標籤：javascript 数组 for循环 索引